LR9 Overload relays Electronic thermal overload relays for F contactors

Presentation

LR9 electronic protection relays are especially suited to the operating conditions of motors.
They provide protection against:
thermal overload of 3-phase or single-phase balanced or unbalanced circuits;
phase failure and large phase unbalance,
protracted starting times,
prolonged stalled rotor condition.

LR9 electronic protection relays are mounted directly below LC1 F type contactor. They cover a range from 30 to 630 A, in eight ratings.
The settings can be locked by sealing the transparent protective cover. Areset button is mounted on the front of the relay.
Two versions are available:
simplified version: class 10: LR9*3** , class 20: LR9 *5**,
complete version: class 10, 10 A or class 20, selectable, conforming to
EN 60947-4-1: LR9**.
This latter version includes an alarm function which makes it possible to forestall tripping by load shedding.

Simplified version: class 10 or 20